Open Flashtool.exe (or Flashtool64.exe on 64-bit operating systems). Let the program take a moment to sync its internal device database.
Understanding and Using Flashtool-0.9.11.0-windows.exe for Sony Xperia Devices flashtool-0.9.11.0-windows.exe
Double-click the Flashtool icon on your desktop to launch the application. 3. Flashing Process Open Flashtool
Open the application.